Many difficulties have ______ as a result of the changeover to a new type of fuel.

If we use the new recycling method, a large number of trees _____.[ ]

I saw a strange cloud ___________ questions__________ it in the game.

Will you tell us what you saw in the room—Sure. _______ inside were lots of strange creatures with white skin and large black eyes.

The listeners were much thanhoped There were so many tickets left